150kW 아크히터 수치해석에서의 복사모델 개선 및 시편 주변의 유입류 분석

IMPROVEMENT OF RADIATION MODELING IN NUMERICAL ANALYSIS OF 150kW ARC HEATER AND ANALYSIS OF INFLOW CONDITION AROUND SPECIMEN

In this study, numerical analysis was performed for 150kW arc heater and inflow around specimen was studied. Pressure, voltage, etc. were similar to experimental data, however efficiency was over estimated. In order to correct efficiency, swirl effect and modified radiative heat flux using configuration factor were considered. It was shown that Swirl had little effect on efficiency although radiative heat flux played an important role on decreasing the efficiency of arc heater. In addition, non-equilibrium analysis that plasma flows moves from an arc heater's nozzle to a specimen were performed.